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diff --git a/llvm/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h b/llvm/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h
new file mode 100644
index 000000000000..6fcd8a09a494
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+++ b/llvm/include/llvm/ProfileData/Coverage/CoverageMappingWriter.h
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+//===- CoverageMappingWriter.h - Code coverage mapping writer ---*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains support for writing coverage mapping data for
+// instrumentation based coverage.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_PROFILEDATA_COVERAGE_COVERAGEMAPPINGWRITER_H
+#define LLVM_PROFILEDATA_COVERAGE_COVERAGEMAPPINGWRITER_H
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ProfileData/Coverage/CoverageMapping.h"
+
+namespace llvm {
+
+class raw_ostream;
+
+namespace coverage {
+
+/// Writer of the filenames section for the instrumentation
+/// based code coverage.
+class CoverageFilenamesSectionWriter {
+  ArrayRef<StringRef> Filenames;
+
+public:
+  CoverageFilenamesSectionWriter(ArrayRef<StringRef> Filenames);
+
+  /// Write encoded filenames to the given output stream.
+  void write(raw_ostream &OS);
+};
+
+/// Writer for instrumentation based coverage mapping data.
+class CoverageMappingWriter {
+  ArrayRef<unsigned> VirtualFileMapping;
+  ArrayRef<CounterExpression> Expressions;
+  MutableArrayRef<CounterMappingRegion> MappingRegions;
+
+public:
+  CoverageMappingWriter(ArrayRef<unsigned> VirtualFileMapping,
+                        ArrayRef<CounterExpression> Expressions,
+                        MutableArrayRef<CounterMappingRegion> MappingRegions)
+      : VirtualFileMapping(VirtualFileMapping), Expressions(Expressions),
+        MappingRegions(MappingRegions) {}
+
+  /// Write encoded coverage mapping data to the given output stream.
+  void write(raw_ostream &OS);
+};
+
+} // end namespace coverage
+
+} // end namespace llvm
+
+#endif // LLVM_PROFILEDATA_COVERAGE_COVERAGEMAPPINGWRITER_H